Siemens SITRANS LT500 - Page 108

Technical specifications
8.8 Communication
SITRANS LT500 with ultrasonic transducer inputs
108 Compact Operating Instructions, 02/2024, A5E52021877-AA
HART
Version: 7.5
Physical layer
HART Physical layer (2 wire half duplex, HART FSK)
Connections
See HART (Page 43)
Termination
Not applicable
Application
General purpose
Device address
0 to 63 (Set via communication or HMI)
Data rate
1.2 Kbps
Data bits
Always 8
Parity
Odd parity, 1 stop bit
Byte order
MSB
Note
Replacing HART card
The HART long address is bound to the specific card installed. If this card is replaced the
master system will need to be updated.
Modbus RTU
Version: V1.1B3
Physical layer
EIA-RS485 (2 wire half duplex)
Connections
See Modbus RTU (Page 45)
Termination
External 120R resistor across Fieldbus connections 35 and 36
Application
General purpose
Device address
Set by Modbus or HMI range from 1 to 247
Data rate
1.2 Kbps
2.4 Kbps
4.8 Kbps
9.6 Kbps
19.2 Kbps (default)
38.4 Kbps
57.6 Kbps
76.8 Kbps
115.2 Kbps
Data bits
Always 8
Parity
Even parity, 1 stop bit (default)
Odd parity, 1 stop bit
No parity, 2 stop bits
No parity, 1 stop bit
Byte order
Byte order adjustable via Modbus or HMI, default Big endian